indiya
Uploaded by
20 SLIDES
269 VUES
200LIKES

Digestive System in Human Anatomy | Digestion, Organs, Functions

DESCRIPTION

Learn about digestion - breaking down food for absorption, the alimentary canal, accessory organs like the liver and pancreas. Explore the process, from the mouth to the large intestine in anatomy and physiology.

1 / 20

Télécharger la présentation

Digestive System in Human Anatomy | Digestion, Organs, Functions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. DIGESTIVE SYSTEM Chapter 3

  2. Digestion is the mechanical and chemical breaking down of food into smaller components, to a form that can be absorbed, for instance, into a blood stream. Digestion is a form of catabolism; a break-down of macro food molecules to smaller ones.

  3. Anatomy/Physiology • Responsible for the intake, digestion of food, absorption of nutrients, and elimination of solid waste. • Alimentary Canal (GI tract) • Aliment/o - to nourish

  4. Accessory Digestive Organs • Teeth • tongue • salivary glands • liver • gallbladder • pancreas

  5. Oral Cavity • Mouth (bucca, tongue) • papillae • Teeth • Mastication • dentin • pulp • gingiva

  6. Teeth • Maxillary arch (upper) • Mandibular arch (lower) • anterior teeth for biting and tearing • posterior teeth for chewing and grinding • dent/i - teeth • decidu/o - shedding • Primary - 20 teeth • Permanent - 32 teeth

  7. Oral Cavity • Palate, hard and soft • bolus • Pharynx • Uvula • Esophagus • Epiglottis

  8. Esophagus • Gullet • chyme • cardiac, or lower esophageal or gastroesophageal sphincter

  9. Stomach • Body, fundus • pylorus • rugae • pyloric sphincter Fundus Body

  10. Small Intestine • small bowel • enter/o - small intestine • villi • Parts • duodenum • jejunum • ileum • ileocecal valve

  11. Large Intestine • Large Bowel • col/o or colon/o • cecum • vermiform appendix

  12. Colon • ascending • hepatic flexure • transverse • splenic flexure • descending • Sigmoid • Rectum • Anus

  13. Liver - hepat/o • Functions • production of bile • glucose - glycogen • storage of vitamins, B12, A, D, E, K • erythrocytolysis (pigment released eliminated in bile called bilirubin) • bilirubin gives stool its characteristic dark color • removes toxins from blood • manufactures blood proteins

  14. Pancreas • internal - endocrine function • insulin • glucogon • external - exocrine function • amylase - carbohydrates • trypsin, chymotrypsin - proteins • lipase - fats • enzymes inactive until reach duodenum

  15. Gallbladder • pear-shaped sac under the liver • chol/e means bile or gall • cyst/o means cyst or sac • gallbladder contracts forcing bile out cystic duct into common bile duct.

  16. Bile • bile is a digestive juice- emulsifier acts on fat in a way that lipid enzymes can digest fat • travels via hepatic duct to cystic duct to gall bladder, where stored • bile consists of water, bile salts, cholesterol, and bilirubin (a colored substance resulting from breakdown of hemoglobin) • bilirubin gives bile yellow or orange color

  17. Stomach during Digestion • Gastric juices • HCL - activates enzymes • protease • pepsin • lipase • Chyme

  18. Small Intestine during Digestion • digestion completed in small intestine • chyme mixed with bile and pancreatic juices • emulsification • absorption

  19. Large Intestine • receive fluid waste products and store until released from body. • excess water absorbed • feces, stools • defecation, or bowel movement

More Related